The entire series is also available for purchase on iTunes. (Click here to view season 4 in HD and here to view it in SD.) The show is on Amazon as well, but the latest few episodes have not yet been added.

Sent email to amazon today and asked if they could upload the most recent episodes, they are missing the last 4. They responded that episodes missing are usually ones they do not have rights to yet. Would love it if UP could process this a little faster. I really enjoyed staying up to date on episodes.